A kind of energy-saving and environment-friendly phosphorus pentoxide production process

A phosphorus pentoxide and production process technology, applied in the field of phosphorus pentoxide production process, can solve the problems of heavy air pollution, inability to recycle, not green enough, etc.

Active Publication Date: 2020-12-01
中维新材料科技(浙江)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It can be seen from the above process that the shortcomings of the prior art are very obvious. First, the tail gas is directly emptied after a simple water cycle, which causes great air pollution; second, the desiccant uses quicklime or concentrated sulfuric acid, which cannot be recycled and is not green enough.

Method used

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  • A kind of energy-saving and environment-friendly phosphorus pentoxide production process

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Embodiment 1

[0054]An energy-saving and environment-friendly phosphorus pentoxide production process, the steps are as follows:

[0055] (1) Air drying: the air is passed into the drying chamber, so that the air pressure in the drying chamber is 1.8atm, and the drying chamber contains a desiccant, and the content of the desiccant in the chamber is 200g / m 3 , the drying chamber is equipped with an ultraviolet lamp, the wavelength of ultraviolet light is 280nm, and the ultraviolet light is irradiated for 45 minutes to obtain dry gas;

[0056] The desiccant is P 2 S 5 ;

[0057] (2) Melting of yellow phosphorus: heating yellow phosphorus to 70°C to melt to obtain fused yellow phosphorus;

[0058] (3) Oxidation: Pass dry gas and melted yellow phosphorus into the oxidation chamber, the amount of air introduced is 0.3 times the amount of air required for yellow phosphorus combustion theory, oxidation reaction occurs, crude product A is obtained, and the outlet temperature is 620°C;

[0059] ...

Embodiment 2

[0067] Preparation process is identical with embodiment 1, only impurity remover is different;

[0068] Described impurity remover is ferric tartrate / acid activated carbon;

[0069] The preparation method of the impurity remover is to add activated carbon to 0.2mol / L ferric nitrate aqueous solution, 300W / 40kHz ultrasonic for 30 minutes, add tartaric acid, adjust the pH value to 2.0, stir at 400rpm for 2 hours after the adjustment is completed, and pass through a 500-mesh sieve , the obtained solid was washed once with 1.5 times the volume of ferric nitrate aqueous solution, and dried at 100 ° C to obtain;

[0070] The amount of activated carbon added per liter of ferric nitrate aqueous solution is 60 mg.

Embodiment 3

[0072] Preparation process is identical with embodiment 1, only impurity remover is different;

[0073] Described impurity remover is lanthanum tartrate / acid activated carbon;

[0074] The preparation method of the impurity remover is to add activated carbon to 0.2mol / L lanthanum nitrate aqueous solution, 300W / 40kHz ultrasonic for 30 minutes, add tartaric acid, adjust the pH value to 2.0, stir at 400rpm for 2 hours after the adjustment is completed, and pass through a 500-mesh sieve , the obtained solid was washed once with water of 1.5 times the volume of the lanthanum nitrate aqueous solution, and dried at 100°C to obtain it;

[0075] The amount of activated carbon added per liter of lanthanum nitrate aqueous solution is 60 mg.

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Abstract

The invention provides an energy-saving and environment-friendly phosphorus pentoxide production process, and belongs to the field of nonmetal oxide production. In the process, phosphorus pentasulfideis adopted as an air drying agent, the drying agent can release compounds removing arsenic impurities when drying air, arsenic impurities can be effectively removed after the drying agent enters an oxidation chamber together with dried air, and thus yellow phosphorus with a high arsenic content also can produce low-arsenic-content phosphorus pentoxide; besides, a new impurity remover and tail gasabsorbent are adopted and can reduce the content of various pollutants in tail gas, and further recycling is facilitated. The arsenic content of phosphorus pentoxide produced with the process can beas low as 8 ppm.

Description

technical field [0001] The invention belongs to the field of non-metal oxides, in particular to an energy-saving and environment-friendly production process of phosphorus pentoxide. Background technique [0002] The yellow phosphorus industry is the basic chemical raw material industry, the foundation of modern phosphorus chemical industry, and occupies an important position in the national economy. However, this industry is a high-energy-consuming and polluting industry, so it needs technological transformation and structural adjustment, strict control of pollutant emissions, and a substantial reduction in pollutant emissions. [0003] Phosphorus pentoxide, chemical formula P 2 o 5 . Phosphorus is produced by burning or being ignited in oxygen. It is white amorphous powder or hexagonal crystal. Hygroscopic. 360°C sublimation. Dissolving in water generates a lot of heat and generates phosphoric acid, and the reaction to ethanol is similar to that of water. The relati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/12
CPCC01B25/12
Inventor 陈文标
Owner 中维新材料科技(浙江)有限公司
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